Most of the time I shoot without a neck-strap so I wanted something that I could remove very easily.

I ended up getting these $4 S-biners that work great with any strap. You can also attach them on one of the body connectors, or on the base-plate. They have a rating of 5 lb each, so 10lb in total, but somebody did some testing on amazon and claims they can handle at least 55lb without deforming. I can tell you too, they feel really strong.